Improvement in throttle-valve gear



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SAMUEL MOORE, OE PROVIDENCE, RHODE ISLAND.

Letters` PatentNo. 92,990, dated Jah] 27, 1869.

IMPROVEMENT IN 'THROTTLE-VALVE GEAR.

How- The Schedule referred to these Letters Patent and making part of the same.

To all whom it may concern Be it known that I, SAMUEL MOORE, of Providence,- in the county of Providence, and Stute of Rhode Island, have invented a new and useful Improvement in Throttle-Valve Gear; and I do hereby declare that the following is a full, clear, and exact description thereof; which Will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification. l

This invention relates to an improved friction-attachment for the throttle-valve levers, for holding them in any required position, to prevent them from being inadvertentlymoved by jarring or otherwise.

The invention consists in the combination of a fixed toothed or friction-segment, withv the valve-stern, and a friction-pinion on the lever, so arranged that the movement of the level' causes the pinion to revolve,

which, being controlledby a friction-clamp, will resist any tendency of the lever to move, and thereby hold it as set by the attendant. A pivoted handle for the friction-clamp is provided, and-so arranged as to be grasped, and the friction released when the lever is grasped for moving.

Figure 1 represents a plan'view, and

Figure 2,'a side elevation of my improved attach- Similar letters of reference indicate corresponding parts.

A represents the valve-stem;

.taehed to the valve-stem; and

pinion F to revolve, andjthis,being resisted by 'the friction-clamp, prevents the lever from being movedl by gravity or by any jars to which it may be exposed, especially on locomotive-engines.

The frictiondevice which Iv have here represented,

consists of a spring band, encircling Vthe hub G, and securedby one end to the lever B, the other being connected to a lever, I, pivoted to the lever B at H, and so arranged that when the lever B is grasped by the attendant for adjustment, the friction will be released.

Having thus described my invention, What I-elaim as new, and desire tol secure by Letters Patent, is The combination, with the stem and operating-lever of' a throttle-valve, of a segm ent, B, a friction-pinion and a friction-device, substantially as s ecilied.

' SAMUE MOORE.

Witnesses:

-v W.' B. VINCENT,

GEO. N.- BLISS. 

